Yeah, always be upfront. First thing I say if I don't like who answered the door is "can I see who else is working?". The spas where I've gotten to see all their women as standard protocol is:
VIP Spa
La Monny
Elite Spa in Scarborough (but that was 10 years ago)
There was also a spa on East or West Beaver Creek where all the girls looked coked out of their minds, can't remember the name though